EP 2040380 A3 20141126 - EL emitting touch switch
Title (en)
EL emitting touch switch
Title (de)
EL-emittierender Berührungsschalter
Title (fr)
Commutateur tactile électroluminescent
Publication
Application
Priority
JP 2007242059 A 20070919
Abstract (en)
[origin: EP2040380A2] An EL emitting touch switch is provided with differential amplifier circuits each including an operational amplifier (41) and resistors (R1, R2, R3, R4) for supplying an electric current to a corresponding surface electrode (1a) so that the potential of the surface electrode (1a) may become equal to that of a back electrode (1d). While the application of a driving voltage to an EL layer (1) is stopped, a corresponding detector (40) of the EL emitting touch switch detects the contact of a human body with the surface electrode (1a) on the basis of the output signal from the operational amplifier (41).
IPC 8 full level
H03K 17/96 (2006.01)
CPC (source: EP KR US)
H01H 13/702 (2013.01 - KR); H01H 36/00 (2013.01 - KR); H03K 17/9622 (2013.01 - EP KR US); H03K 2217/960785 (2013.01 - EP KR US)
Citation (search report)
- [I] US 2005206623 A1 20050922 - HEIN DAVID A [US], et al
- [A] US 4740781 A 19880426 - BROWN KENNETH A [US]
- [A] JP H10190433 A 19980721 - MATSUSHITA ELECTRIC WORKS LTD
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
EP 2040380 A2 20090325; EP 2040380 A3 20141126; EP 2040380 B1 20181010; EP 2040380 B8 20190306; CN 101394175 A 20090325; CN 101394175 B 20120118; JP 2009076237 A 20090409; JP 4791427 B2 20111012; KR 100992278 B1 20101105; KR 20090030194 A 20090324; RU 2008125131 A 20091227; RU 2389132 C2 20100510; US 2009073133 A1 20090319; US 8766924 B2 20140701
DOCDB simple family (application)
EP 08005164 A 20080319; CN 200810125254 A 20080623; JP 2007242059 A 20070919; KR 20080030101 A 20080401; RU 2008125131 A 20080620; US 7620708 A 20080314